George Bush, one-and-a-half years old, is shown in this undated photo at the family summer home in Kennebunkport, Maine.
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George Bush, left, is shown with his brother Prescott Bush Jr., in this undated photo
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Future President George Bush carries his infant son George W. Bush on his shoulders on the Yale University campus. Ca. 1947.
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George and Barbara Bush pose with children Neil, George W., Jeb and Marvin Bush in 1956.
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George W. Bush, left, is shown with his father, George H.W. Bush in this photo from 1968. The elder Bush is about to pin a lieutenant bar on his son after he was made an officer in the Texas Air National Guard.
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Rep. George H.W. Bush, R-Texas., who is seeking a seat in U.S. Senate, talks with a group of young people at a rally in Houston, Texas., on Oct. 9, 1970. Bush is opposed by Lloyd Bentsen, wealthy Houston businessman, who defeated Sen. Ralph Yarborough in the State Democratic Primary
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Republican candidate George Bush stands with presidential candidate Ronald Reagan at the Republican Convention July 1980 in USA. Reagan announced that George Bush will be his running mate for the presidential elections.
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Pres. Ronald Reagan, right, with Vice Pres. George H. W. Bush at back, talks to reporters at the White House as he and Mrs. Reagan prepare to leave for their trip to Europe, Friday, June 1, 1984, Washington, D.C. They will visit Ireland and London with a stop in Normandy.
Barry Thumma / AP Photo
In this Aug. 18, 1988 file photo, Republican presidential candidate, Vice President George Bush , right,and his running mate Sen. Dan Quayle, R-Ind., wave to the assembly of the Republican National Convention in New Orleans after their respective acceptance speeches for the presidential and vice-presidential nomination.
J. Scott Applewhite / AP Photo
President George Bush raises his hand Jan.20,1989 as he takes the oath of office as president of the United States outside the Capitol. Vice President Dan Quayle watches from behind.
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President George H.W. Bush and wife, Barbara dance at the inaugural ball at the Pension Building in Washington, on Friday, Jan. 20, 1989.
Scott Applewhite / AP Photo
U.S. President George H. Bush points the way to British Prime Minister Margaret Thatcher as they meet for breakfast at the residence of the U.S. ambassador to Paris, France, Saturday, July 15, 1989. The leaders are in Paris to attend the Economic Summit.
Dennis Cook / AP Photo
U.S. President George H. Bush warmly touches Soviet President Mikhail Gorbachev as they meet before the dinner hosted by Bush, Monday, Nov. 19, 1990 in the American Embassy in Paris.
Scott Applewhite / AP Photo
U.S. President George H. Bush smiles after throwing a golf ball to a group people who were watching him tee off on the 5th hole of the Casparilla Golf Club in Boca Grande, Fla., Saturday, Nov.14, 1992. The president is winding up a five day vacation.
Dennis Cook / AP Photo
Former U.S. President George H.W. Bush and his wife, Barbara Bush, pay their respects to former U.S. President Ronald Reagan in the U.S. Capitol Rotunda June 10, 2004 in Washington, DC. Reagan's body will lie in state until his funeral at the National Cathederal June 11 in Washington, DC.
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U.S. President George W. Bush (R) and his father, former U.S. President George Bush (L) wave as the leave a family wedding at St. John's Episcopal Church May 6, 2006 in Washington, DC. Alexander Ellis, son of George W. Bush's cousin, married Sarah Aker.
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Former President George H. W. Bush fights back tears as he comments on calls he received after former First Lady Barbara Bush's open heart surgery at Methodist Hospital in Houston on Thursday March 5, 2009. (AP Photo/Michael Stravato)
Michael Stravato / AP Photo
Former President George H. W. Bush, left, walks with his wife, former first lady Barbara Bush, followed by their son, President George W. Bush, and his wife first lady Laura Bush, to a reception in honor of the Points of Light Institute, Wednesday, Jan. 7, 2009, in the East Room at the White House in Washington.
Manuel Balce Ceneta/ AP Photo
Former President George Herbert Walker Bush and First Lady Barbara Bush, September 30, 2003 at their home 'Walkers Point', Kennebunkport, Maine. The Former President and First Lady play Golf at the Cape Arundel Golf Club in Maine. The former President on his "Segway" at his Kennebunkport home , made famous recently after his son, current president fell off it.
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